Free craft tools
Knitting and crochet calculators
Choose the job you need to solve: measure gauge, resize a pattern, estimate yarn, plan a blanket, lay out granny squares, or count rows.
Before you cast on
Measure your fabric, adjust the pattern, and plan the yarn.
- What does my swatch measure?Gauge calculatorTurn your swatch into stitches per inch.22 sts over 4 in = 5.5 sts/in
- How do I adjust this pattern?Pattern resizeAdjust a pattern's stitch and row counts to match your blocked gauge.Pattern: 100 sts at 20 sts/4 in. Your gauge: 22 sts/4 in → 110.
- Do I have enough yarn?Yarn estimatorFind out if you have enough before you start.About 1,240 yd. That's 6 skeins.
- What weight is my yarn?Yarn weightIdentify a yarn's weight category from wraps per inch.12 WPI → Fine, Light, or Medium
Plan the finished size
Turn dimensions into workable stitch, row, and square counts.
While you make
Keep your place and return to the work without guessing.
Working on something? Keep it together in a project and save it on this device.
Choose a calculator by where you are in the project
Before you begin: turn a blocked swatch into usable numbers with the knitting and crochet gauge calculator, then use the pattern resize calculator if your gauge differs from the pattern.
Plan size and materials:calculate starting stitches and rows with the blanket size calculator, build a square grid with the granny square calculator, or estimate yardage and skeins with the yarn calculator.
While you make: keep your place across rows and repeats with the online row counter, and space shaping increases or decreases evenly with the increase and decrease calculator. Every calculator works without an account and shows the inputs or math behind its result.